Question

Difference between modern and mendeleev's periodic table>..

Answer 1

Henry Moseley put forward the modern periodic table .He stated that"the properties of elements are the periodic functions of their atomic number" whereas Dmitri Mendeleev's periodic table states that "the properties of elements are the periodic functions of their atomic masses".

Answer 2

Answer:

• Mendeleev's periodic table

1. elements are arranged in increasing order of their atomic masses.
2. It is not divided into any blocks.
3. There are 8 groups.
4. Isotopes could not be placed properly.

• Modern periodic table

1. Elements are arranged in increasing order of their atomic numbers.
2. It is divided into four blocks, namely s-block,p-block,d-block and f-block.
3. There are 18 groups.
4. Isotopes occupy the same position as the element.

Hope you understood mate!!!